CVE-2018-1000112: Mercurial Incorrect Authorization Vulnerability

MODERATE
Advisory Identifier: GHSA-f9cx-789c-w2mr
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CVSS 5.3
CWE-863
Published
Advisory Summary

CVE-2018-1000112 is a MODERATE (CVSS 5.3) incorrect authorization vulnerability (CWE-863: Incorrect Authorization) affecting Mercurial libraries in the Maven ecosystem. The issue involves incorrect authorization in jenkins mercurial plugin. Remediation is available by upgrading affected packages to version 2.3.

CVE-2018-1000112 at a Glance

CVE Identifier CVE-2018-1000112
GHSA Identifier GHSA-f9cx-789c-w2mr
Severity MODERATE
CVSS v3.1 Base Score 5.3
CWE Classification CWE-863: Incorrect Authorization
Affected Product Mercurial
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 5.3

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality Low (C:L)
Integrity None (I:N)
Availability None (A:N)

How to Fix CVE-2018-1000112

To remediate this vulnerability, upgrade all affected Mercurial dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

org.jenkins-ci.plugins:mercurial fixed: 2.3 
<dependency>
    <groupId>org.jenkins-ci.plugins</groupId>
    <artifactId>mercurial</artifactId>
    <version>2.3</version>
</dependency>
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

mvn dependency:tree -Dincludes=org.jenkins-ci.plugins

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2018-1000112, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree -Dincludes=org.jenkins-ci.plugins

Analyze the terminal output to locate any version of Mercurial in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2.3), your application is affected.

Note: The mvn dependency:tree -Dincludes=org.jenkins-ci.plugins command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-863: Incorrect Authorization, where the product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check. In Mercurial, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

An improper authorization vulnerability exists in Jenkins Mercurial Plugin version 2.2 and earlier in MercurialStatus.java that allows an attacker with network access to obtain a list of nodes and users.

CVE-2018-1000112 Affected Mercurial Versions

1 component(s)
Fixed Versions:
2.3
Product / Package Ecosystem Affected Versions Fixed Version
org.jenkins-ci.plugins:mercurial
maven/org.jenkins-ci.plugins/mercurial
Maven
< 2.3
2.3

References

NVD — CVE-2018-1000112 NVD
https://nvd.nist.gov/vuln/detail/CVE-2018-1000112
Security Fix Commit FIX COMMIT
https://github.com/jenkinsci/mercurial-plugin/commit/54b4f82e80c89d51b12bc64258f6b59e98b0c16a
Mercurial Security Information SECURITY
https://jenkins.io/security/advisory/2018-02-26/#SECURITY-726

Frequently Asked Questions

What is CVE-2018-1000112?
CVE-2018-1000112 is a security vulnerability in Mercurial involving Incorrect Authorization in Jenkins Mercurial Plugin under CWE-863: Incorrect Authorization.
Which Mercurial versions are affected?
Affected versions include releases prior to 2.3 across affected packages: org.jenkins-ci.plugins:mercurial.
What version fixes CVE-2018-1000112?
Upgrading to 2.3 (or the latest patched release for your respective branch) resolves the vulnerability.
Is mercurial affected?
Yes, org.jenkins-ci.plugins:mercurial is affected in releases prior to 2.3. Upgrade your dependency to 2.3 or later.
What is the CVSS score of CVE-2018-1000112?
CVE-2018-1000112 has a CVSS v3.1 base score of 5.3 (MODERATE) with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.
What CWE is associated with CVE-2018-1000112?
CVE-2018-1000112 is classified under CWE-863: Incorrect Authorization (The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.).
How can I check Maven dependencies for CVE-2018-1000112?
Run the dependency tree command: 'mvn dependency:tree -Dincludes=org.jenkins-ci.plugins'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-f9cx-789c-w2mr",
  "modified" : "2022-06-30T18:31:43Z",
  "published" : "2022-05-13T01:48:32Z",
  "aliases" : [ "CVE-2018-1000112" ],
  "summary" : "Incorrect Authorization in Jenkins Mercurial Plugin",
  "details" : "An improper authorization vulnerability exists in Jenkins Mercurial Plugin version 2.2 and earlier in MercurialStatus.java that allows an attacker with network access to obtain a list of nodes and users.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.jenkins-ci.plugins:mercurial"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "2.3"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 2.2"
    }
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2018-1000112"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/jenkinsci/mercurial-plugin/commit/54b4f82e80c89d51b12bc64258f6b59e98b0c16a"
  }, {
    "type" : "WEB",
    "url" : "https://jenkins.io/security/advisory/2018-02-26/#SECURITY-726"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-863" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2022-06-30T18:31:43Z",
    "nvd_published_at" : "2018-03-13T13:29:00Z"
  }
}